Storage Spaces Direct Says not Enough Reserve Capacity

I found a health alert on our small S2D cluster saying there was not enough reserve capacity on the Cluster.  We have a two node storage spaces direct cluster with 4 1.6TB SSD's per server for a total of  about 11gigs total when I set up the cluster for mirrored pool there was only about 6gig usable which I split between the two servers I have two 2.7gig CSV's one has 915GB free the other has 1.95TB free. Does anyone know what I am missing here?

S2D1.JPGS2D2.JPGS2D3.JPG
S2D4.JPGS2D5.JPG
Kissel-BAsked:
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andyalderSaggar maker's framemakerCommented:
If you lose a disk there won't be enough disk capacity left for Storage Spaces to continue to mirror everything until you replace that failed disk.
Kissel-BAuthor Commented:
So what you saying disk 4 in each server A disks 1 and 2 are mirrored to Server B disks 3 and 4 and Server B disks 1 and 2 are mirrored to Server A disks 3 and 4 basically so the reserve capacity has to come from disks 1 and 2 which would be each server CSV.  Do you know how much the reserve would be?  The S2D calculator I used before is no longer available
andyalderSaggar maker's framemakerCommented:
I think adding one disk to each server/poo; would stop you getting the warning, it's a bit like a traditional RAID 10 plus hot spare - you still have RAID10 but no spare available. The best thing to do is probably ignore it. There are a couple of Storage Spaces experts at EE who may know better than me if you wait a while.
QLink S2DCommented:
here's a working link for the calculator: http://aka.ms/s2dcalc

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Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- QLink S2D (https:#a42430971)
-- Handy Holder (https:#a42429169)
-- Handy Holder (https:#a42429222)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

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